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Issue 4, 2008
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Columnar mesophases from half-discoid platinum cyclometalated metallomesogens

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Abstract

A series of liquid crystals have been synthesized and studied based upon mononuclear ortho-platinated rod-like heteroaromatic and 1,3-diketonate ligands. The liquid crystalline properties of these molecules were investigated using polarized light optical microscopy, differential scanning calorimetry, single crystal X-ray diffraction, and powder X-ray diffraction. Increasing the number of alkyl chains attached to the 1,3-diketonate units resulted in a transition from lamellar (SmA) to hexagonal columnar phases (Colh). The 2-thienylpyridine units were previously unexplored in metallomesogenic complexes and these studies extend the utility of ortho-platinated 2-phenylpyridines and 2-thienylpyridines to produce columnar liquid crystalline phases. The platinum complexes all display photoluminescence and are of interest for electrooptical applications.

Graphical abstract: Columnar mesophases from half-discoid platinum cyclometalated metallomesogens

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Article information


Submitted
17 Sep 2007
Accepted
06 Nov 2007
First published
26 Nov 2007

J. Mater. Chem., 2008,18, 400-407
Article type
Paper

Columnar mesophases from half-discoid platinum cyclometalated metallomesogens

K. Venkatesan, P. H. J. Kouwer, S. Yagi, P. Müller and T. M. Swager, J. Mater. Chem., 2008, 18, 400
DOI: 10.1039/B714291A

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